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 ###Instrução: Qual é a média dos Top-25 que têm um Top-10 menor que 7 e o Torneio é o campeonato aberto, com um Top-5 maior que 1?
 ###Tabelas: CREATE TABLE pdc_premier_event_finals:_5_1_title_4_runner-ups (pdc_premier_event_finals:_5_1_title_4_runner-ups_id AUTO_INCREMENT PRIMARY KEY, Outcome VARCHAR, Year INT, Championship VARCHAR, Opponent in the final VARCHAR, Score (l) = score in legs, (s) = score in sets. VARCHAR) CREATE TABLE summary (summary_id AUTO_INCREMENT PRIMARY KEY, Tournament VARCHAR, Wins INT, Top-5 INT, Top-10 INT, Top-25 INT, Events INT, Cuts made INT) CREATE TABLE fixtures (fixtures_id AUTO_INCREMENT PRIMARY KEY, Final VARCHAR, Date VARCHAR, Home Team VARCHAR, Score VARCHAR, Away Team VARCHAR, Attendance INT, Stadium VARCHAR) CREATE TABLE specifications_r-985_wasp_junior_sb (specifications_r-985_wasp_junior_sb_id AUTO_INCREMENT PRIMARY KEY, Engine VARCHAR, Power, continuous VARCHAR, Critical altitude This is the highest altitude at which the engine can achieve its full continuous power rating. Above this altitude, power falls off with height as with a naturally aspirated engine . See Supercharger#Altitude effects for details. VARCHAR, Power, takeoff VARCHAR, Compression ratio VARCHAR, Supercharger gear ratio VARCHAR, Octane rating VARCHAR, Dry weight VARCHAR) CREATE TABLE top_goalscorers (top_goalscorers_id AUTO_INCREMENT PRIMARY KEY, Name VARCHAR, Years VARCHAR, League a VARCHAR, FA Cup VARCHAR, League Cup VARCHAR, Other b VARCHAR, Total VARCHAR)  
SELECT AVG Top-25 FROM summary WHERE Top-10 < 7 AND Tournament = the open championship AND Top-5 > 1